Turbine-fan structure



Oct. 16, 1928.

w. F. cARMlcHAEL TURBINE Flm s'rnucwunm Filed 001;. 22, 19 25 EH2 I-INVENTOR BY ii/,1 I

- A TTORNEYK Patented Oct. 16, 1928.

UNITED STATES- PATENT OFFICE.

WILLIAM F. CARMICHAEL, OF LANSING, MICHIGAN, ASSIGNOR TO NEW WAY MOTORCOMPANY, OF LANSING, MICHIGAN.

TURBINE-FAN STRUCTURE.

Application filed October 22, 1925. Serial No. 64,160.

This invention relates to an improved turbine fan structure especiallyorganized for cooling air-cooled internal combustion engines.

The main object of the invention is to provide such a structure which isvery effective in use and very economical to produce.

Objects pertaining to details and economies of my invention willdefinitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and meansdescribed in the following specification. The invention is clearlydefined and pointed out in the claims.

A structure embodying the features of my invention is clearlyillustrated in the accompanying drawing forming a part of this,application, in which:

Fig. I is a detail elevation view of the fly-wheel of an internalcombustion engine with my improved turbine fan on' its face.

Fig. II is a detail sectional view on. a line I 2-2 of Fig. I showingdetails of construction.

Fig. III is an enlarged detail sectional view on a line 3-3 of Figs. Iand II showing the fan blade and its tapered form to enable productionby casting.

Fig. IV is a modified form in which the fan is cast in a separate piece.

Fig. V is a sectional view on line 55 of Fig. IV through the fly-wheelshowing the means of securing this separate cast fan structure to thefly-wheel by stud bolts.

Fig. VI is a small detail view of the volute casing of an internalcombustion structure in its relation to the fan rotor.

In the drawing the sectional views are taken looking in the direction ofthe little arrows at the ends of the section lines and similar numeralsof reference indicate similar parts throughout the several views.

In the description the parts ofthe drawing will be indicated by theirnumerals of reference. 1 is the fly-wheel. -2 is the auxiliary fan rimof theifly-wheel. 3are .the driven blades of the fan-cast integral withthe auxiliary rim and the fiy-wheel. The blades of the usual turbineform as used in a peripherally bladed fan are curved and tapered to drawfrom the mold in casting as seen in Fig. III- The outer end 4: iscompa'ratively sharp and free to revolve in the volute to carry amaximum amount of air for the weight of the fan part. 5 is the volutecasing of the .usual form and open at both sides, the fan being open toreceive air direct to the blades from both sides and discharging throughthe volute to cool the engine.

In the modified form the fan is preferably made as an aluminum castingon an auxiliary fan ring 6 which is secured to bosses 7 on the spokes ofthe fly-wheel by stud-bolts 8 having nuts 9 thereon as clearly appearsin Figs. IV and V. mum of efficiency because the blades are unobstructedat their ends. I have thus described my invention in detail and I desireto claim the same specifically as well as broadly as pointed out in theappended claims.

Havingthus described my invention what I claim as new and desire tosecure by Letters Patent is:

1. In a cooling fan structure for an internal combustion engine, thecombination with the flywheel, of. an auxiliary peripherally bladed fanrim cast thereon with to permit of casting, and a volute open at bothsides surrounding the same to provide intakes to deliver air to the fanblades at both sides of the fan, coacting as specified.

2. In a cooling fan structure for an internal combustion engine, thecombination with the flywheel, of an auxiliary peripherally bladed fanrim cast thereon with integral curved turbine peripheral fan blades freeat their outer'ends, and a volute open at both sides surrounding thesame to pr0- vide intakes to deliver air to the fan blades at both sidesof the fan, coacting as specified.

In witness whereof I have hereunto set my hand.

, WILLIAM F. VOARMIGHAEYL.

This form of fan has the maxi-

